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Finding the Fourth Proportional to 125,635.20, 188,452.80 and 55,478.40

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Solution

The fourth proportional to 125,635.20, 188,452.80 and 55,478.40 is: 83,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,635.20 : 188,452.80 = 55,478.40 : x
  2. Step 2: Convert to fraction form
    125,635.20/188,452.80 = 55,478.40/x
  3. Step 3: Cross multiply
    125,635.20x = 188,452.80 × 55,478.40
  4. Step 4: Simplify right side
    125,635.20x = 10,455,059,819.52
  5. Step 5: Solve for x
    x = 10,455,059,819.52/125,635.20
  6. Step 6: Final answer
    x = 83,217.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.